When I initially responded to this post, I hadn't seen the marketing email yet, so thanks for bringing it to my attention. I have confirmed the policy remains the same and solution packs, including PowerGallery, are not part of the extension library subscription. The issue with the email some of you have received has been addressed and will be corrected.
To clarify some things about PowerGallery, here is some info about the 4 bullet points from the email.
5 Gallery Types
PowerGallery includes 5 stunning image gallery designs, with both dark and light themes, giving you a variety of options for your website gallery - even add your own custom text watermark.
Simple Install Wizard
Simply upload PowerGallery’s files to your server, and open your browser to launch the Installation Wizard to configure your PHP photo gallery.
Easy Image Uploads
Upload single images via you web browser or upload multiple images from your server. Your images will be processed and automatically resized/watermarked to work with your image galleries.
Easily create and make changes to your image gallery – add a new gallery, upload and manage images, modify titles and descriptions, and quickly change designs.
Multiple Image Galleries
With PowerGallery you can set up and manage as many image galleries as you desire - display any number of your galleries in various locations throughout your site with ease.